What EPA's radon map says about Jim Hogg County

EPA's own radon map rates Jim Hogg County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally, Jim Hogg County ranks higher in radon potential than 2% of rated counties (the 2nd percentile).

Jim Hogg County by the numbers

About 4,583 people live in Jim Hogg County, Texas, spread over 1,136.173 square miles. That works out to roughly 4 people per square mile. Among counties sharing Jim Hogg County's EPA zone, it outranks 7% of them by population. Jim Hogg County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Jim Hogg County

Jim Hogg County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. Even at Zone 3, Jim Hogg County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Next steps for a home in Jim Hogg County

Mitigation cost doesn't depend on Jim Hogg County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Texas's state radon program

Jim Hogg County's test kit answers today; a Airthings radon monitor keeps answering for Jim Hogg County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Jim Hogg County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.